Can the door run without internet?
No. The scanner asks NightHall about every code it reads, so the door needs a connection. Plan redundancy instead of offline mode.
No, the scanner holds no ticket set and asks NightHall about every code it reads, so scanning needs a connection. Plan redundancy: two networks, charged devices, spares, and a printed door list.
Asking about every code is what keeps the door honest. A code scanned twice flags the second attempt wherever it happens, and a refunded ticket stops scanning the moment it is refunded. A downloaded list cannot do either, which is why the scanner holds none.
Redundancy beats offline mode. Bring a second network: the venue line plus a phone hotspot on another provider. Charge every device before doors and bring one spare scanner per gate. Keep a printed door list as the fallback; the Dutch pilot procedure keeps one at every event. If the network fails, admit from the list by name and reconcile the scans after.
Rehearse the failure, not just the flow: kill the hotspot in rehearsal and watch the gate switch networks before the night it matters.
Sources
Scanner behaviour (AGENTS.md: the scanner asks NightHall about every code and holds no ticket set). Printed door list fallback (.litespec/intent/countries/netherlands.md). Checked 14 October 2026.
Applies to: the Netherlands, checked 14 October 2026. NightHall runs the door check; the organizer staffs the gate.
Applies to: Netherlands, checked 14 October 2026